erection mark是什么意思

用法例句

Automatic sorting and layout algorithm for part numbers in 3D CAD assembly drawing;

三维CAD装配序号的自动排序与布局算法

We also give examples when we make assemble plot sequence number and roughness degree, the source program based on AUTOLISP language and the operating steps and results in AUTO CAD R2004.

介绍了用AUTOLISP在AUTOCADR2 0 0 4中进行二次开发的必要性 ,基本原理 ,流程图 ,并且举例作装配图序号和粗糙度时 ,基于AUTOLISP语言的源程序以及在AUTOCADR2 0 0 4中的操作步骤及其结